2 layers107 × 64 mm
2 layers30 × 60 mm
Sensor node kicad
shyver/sensor-nodeThis project is a compact, battery-powered environmental monitoring device built around the ESP32. It is designed to measure temperature, humidity, and atmospheric pressure, and transmit data wirelessly over Wi-Fi.
- Size
- 30 × 60 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 53
- Nets
- 61
- Pads
- 223
- Tracks, vias
- 420, 33
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 18 Mar 2026
- Updated
- 20 Mar 2026
Overview
Sensor node kicad is an open-source printed circuit board by shyver, from the shyver/sensor-node repository on GitHub, published under the MIT licence. It is a 2-layer board of 30 × 60 mm with 53 parts on 61 nets, routed with 420 tracks and 33 vias.
It is built around the ESP32-WROOM-32E, BME280 and TPS63802DLAR, with the DW01A and TP4056-42-ESOP8 among its other parts. Its parts include 21 resistors, 11 capacitors, 5 ICs, 3 diodes and 3 connectors. It belongs with the home automation and IoT and sensors and measurement boards and the ESP32 boards of this library.
Main components
5
ESP32-WROOM-32E
SMD,18x25.5mmSMD,18x25.5mm WiFi Modules ROHSEspressif SystemsWiFi Modules
BME280
LGA-8(2.5x2.5)-40℃~+85℃ 0%RH~100%RH 1.71V~3.6V 1.8uA 16bit I2C、SPI ±0.5℃ ±3%RH LGA-8(2.5x2.5) Temperature and Humidity Sensor ROHSBoschTemperature And Humidity Sensor
TPS63802DLAR
VSON-10(2x3)-40℃~+125℃@(TJ) 1 1.3V~5.5V 1.4MHz、1.6MHz、2.1MHz 1.8V~5.2V 11uA 2A Adjustable Buck-Boost Buck-Boost Built-in Yes VSON-10(2x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
DW01A
SOT-23-6L-40℃~+85℃ 1 2.5V 300mV~10V 3uA 4.3V Protection IC Support SOT-23-6L Battery Management ROHSPUOLOPBattery Management
TP4056-42-ESOP8
ESOP-8-40℃~+85℃ 1 1A 2uA 4.2V 4V~8V Charging IC Lithium Battery Support ESOP-8 Battery Management ROHSTOPPOWERBattery Management
README
readme.mdBattery-Powered ESP32 Environmental Sensor Node
Overview
This project is a compact, battery-powered environmental monitoring device built around the ESP32. It is designed to measure temperature, humidity, and atmospheric pressure, and transmit data wirelessly over Wi-Fi.
The system integrates power management, battery charging, sensing, and communication into a single PCB, making it suitable for IoT applications and embedded product prototyping.
Features
- ESP32-based Wi-Fi connectivity
- Environmental sensing (temperature, humidity, pressure)
- Battery-powered operation (Li-Po)
- USB-C power input and charging
- Integrated battery protection
- Low-power design (deep sleep capable)
- UART interface for programming and debugging
Hardware Architecture
The system is composed of the following main subsystems:
Power Subsystem
- USB-C 5V input
- Li-Po battery charging IC
- Battery protection circuit
- 3.3V regulation stage
- Bulk and decoupling capacitors
Processing Unit
- ESP32-WROOM-32 module
- Boot configuration and reset circuitry
- UART programming interface
Sensor Subsystem
- BME280 environmental sensor (I2C interface)
- Pull-up resistors for I2C communication
Block Diagram
USB-C → Charger → Battery → Regulator → ESP32 → Sensor (I2C)Design Highlights
- Modular schematic organization (power / MCU / sensor)
- Proper decoupling and power distribution
- ESP32 antenna keep-out respected
- I2C bus design with pull-up resistors
- Battery protection and safe charging design
Key Engineering Decisions
-
ESP32 Module Selection Used a pre-certified ESP32 module to simplify RF design and ensure reliable Wi-Fi performance.
-
Battery-Powered Architecture Designed around a single-cell Li-Po battery for portability and real-world IoT use cases.
-
Power Regulation Strategy Implemented a regulated 3.3V rail to ensure stable operation during ESP32 current spikes.
-
USB-C Power-Only Configuration USB-C connector used strictly for power input, avoiding unnecessary USB data complexity.
-
I2C Sensor Interface Selected a digital sensor with I2C to minimize pin usage and simplify routing.
PCB Design
- 2-layer PCB
- Ground plane for signal integrity
- Compact component placement
- Standard SMD components (0603 passives)
- Connector placement optimized for usability
Files Included
Design Files
- Schematic files
- PCB layout files
Manufacturing Files
- Gerbers
- Drill files
- Bill of Materials (BOM)
- Pick-and-place files
Documentation
- Block diagram
- Rendered board images
Applications
- IoT environmental monitoring
- Smart home systems
- Remote sensing nodes
- Battery-powered embedded systems
Future Improvements
- Power path optimization (load sharing / advanced charger IC)
- Lower power consumption tuning
- OTA firmware update support
- Enclosure design integration
- Additional sensor support
Author
Hardware design and layout by Abdelwahed Eloued
License
This project is open-source and available under the MIT License.
Parts
53| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 0.1µF | Capacitor_SMD:C_0603_1608Metric | C4, C7, C8, C9, C10, C11 |
| 6 | 10k | Resistor_SMD:R_0603_1608Metric | R12, R13, R14, R15, R16, R17 |
| 3 | 100k | Resistor_SMD:R_0603_1608Metric | R1, R20, R21 |
| 3 | 10µF | Capacitor_SMD:C_0805_2012Metric | C3, C5, C6 |
| 3 | 1k | Resistor_SMD:R_0603_1608Metric | R5, R6, R8 |
| 2 | 22µF | Capacitor_SMD:C_0805_2012Metric | C1, C2 |
| 2 | 4.7k | Resistor_SMD:R_0603_1608Metric | R18, R19 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R9, R10 |
| 2 | NMOS | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | SW_Push | Button_Switch_SMD:SW_SPST_TL3342 | SW1, SW2 |
| 1 | 0.4 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R11 |
| 1 | 2.4k | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 3V3 | TestPoint:TestPoint_Pad_D1.5mm | TP7 |
| 1 | 470nH | ul_XFL4015-471MEC:IND_XFL4015_COC-M | L1 |
| 1 | 511k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 91k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | BME280 | Package_LGA:Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumbering | U5 |
| 1 | Conn_01x02 | Connector_JST:JST_PH_S2B-PH-SM4-TB_1x02-1MP_P2.00mm_Horizontal | J2 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | DW01A | Package_TO_SOT_SMD:SOT-23-6 | U3 |
| 1 | EN | TestPoint:TestPoint_Pad_D1.5mm | TP9 |
| 1 | ESD5Zxx | Diode_SMD:D_SOD-523 | D3 |
| 1 | ESP32-WROOM-32E | RF_Module:ESP32-WROOM-32D | U4 |
| 1 | GREEN | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | IO0 | TestPoint:TestPoint_Pad_D1.5mm | TP10 |
| 1 | RED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | RX0 | TestPoint:TestPoint_Pad_D1.5mm | TP12 |
| 1 | TP4056-42-ESOP8 | Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm_ThermalVias | U2 |
| 1 | TPS63802DLAR | TPS63802DLAR:VREG_TPS63802DLAR | U1 |
| 1 | TX0 | TestPoint:TestPoint_Pad_D1.5mm | TP11 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_GCT_USB4085 | J1 |
Questions
How big is the Sensor node kicad PCB?
It measures 30 × 60 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sensor node kicad use?
53 parts, built around the ESP32-WROOM-32E, BME280, TPS63802DLAR and DW01A. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Sensor node kicad KiCad files?
From the shyver/sensor-node repository on GitHub, at the commit this page was made from: the board is kicad/sensor_node_kicad.kicad_pcb and its schematic kicad/power.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sensor node kicad design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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